So I just got some of my 24V 8 channel boards in. They look very nice.
I also got my order of PCF8574-IO-Expansion-Board in. They are tiny. . And thus hard to mount.
I'm puzzled by them bringing out an INT pin with the 8 outputs; as least that's what it seems to be. But INT is on the I2C side of the chip, not the parallel, correct?